<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">{{title}}</div>
</body>

</html>
<script src="./vue.js" type="text/javascript"></script>
<script>
    var vm = new Vue({
        el: '#app',
        data() {
            return {
                title: 'Hello World'
            }
        }
        })
</script>